But did you upgrade the extruder for MMU2S? Or did you simply use the magnets and ball for the IR sensor? If the latter, then you will need to also do the MMU2S extruder upgrade.
That is the idler homing and is normal.
It's an IR sensor. Did you use the ball and magnets, or have you printed and used all the MMU2S extruder upgrade parts including the sensor tower and idler door with sensor trigger arm?
You are aware that there are different extruder parts for Mk3S and Mk3S+MMU2S ?
I think your right about the orange tubing. I can print now but sometimes I get skipped layers. I think it is too tight tolerance on the ID and variance in the filament. I can feel sometimes that my filament goes through perfectly and other times it gets stuck and and I find a half moon or mouse bit out of the filament where it has been ground down in the MMU. I have some extra Bowden Tubing. I will have to check the ID.roy.r3 wrote: ↑Mar 17, 2019 2:47 pm
Throw away the orange PTFE Boden Tube delivered from Prusa as its tolerances are very tight. Replace it with a tube having an inner diameter of 2.0 mm instead of 1.85. Once your MMU works, the orange Bowden gets problems with the thicker tips of the filament. The length of the new tube needs to be 360mm.
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